Telephone substation set with multistation connecting switch



Dec. 16, 1952 P. DESCHAMPS TELEPHONE SUBSTATION SET WITH MULTISTATION CONNECTION SWITCH 3 Sheets-Sheet l Filed Feb. 11, 1948 R U T m V m \%J bi INW QM mw kw o u N D J\ F ga F ELF N o S w M M O aim 7 QN O o mN o m m O NN-OLIW 0 Q I) w & m m m w Q Kw p a 43 Fwy PIERRE DESCHAMPS Wm M m M A Dec. 16, 1952 P. DESCHAMPS 2,622,154

TELEPHONE SUBSTATION SET WITH MULTISTATION CONNECTION SWITCH Filed Feb. 11,-1948 3 Sheets-Sheet? INVENTOR PIERRE DESCHAMPS AGENTS Dec. 16, 1952 P. DESCHAMPS 2,522,154

TELEPHONE SUBSTA'IION SET WITH MULTISTAIiON CONNECTION SWITCH Filed Feb. 11, 1948 5 Sheets-Sheet 3 I N VE N TU R PIERRE DESCHAMPS AGENTS Patented Dec. 16, 1952 TELERHONESUBST'ATION SET WITH MULTI- STATION CONNECTING .SWITCH P-ierre Deschamps, Paris, France Application February 11, 1948, Serial N 0. 7,669"

lnFrance January 17, 1945 3 Claims;

particular mechanical *manner to be hereinafter set forth on the contacts to be actuated; this rotary member -'or'disc-being advantageously constituted by the network dialling disc-ordia-l.

Preferred embodiments cf the-present invention will be hereinafter described with'reference to the-- accompanying drawings, given merely by way of example-and in which:

'Fig. 1 is an-electricdiagram ot-a 'station-according to the invention;

Figs. 2 to 4 show, respectively in external-perspective V-iW,iI1 vertical section and-in plan view, astation made according to said diagram;

Fig. 1 shows the circuits of a telephone-system station arranged accordingto my invention with,

atL, theprivate system wire, at R1, R2 the-wires ofone of the network lines to be used bythe' plant, at Ll, Laa long distance line (if it "is sup posed that-such :a line exists); at O and 'OLL the occupation wires of the network andof the lon di-stance line, such wires being provided respectively at all the stations of the private system. A sWitchJCI-I is, on the other hand, provided, the

fixed contact 'studs- 81-86 etc., which are disposed in a circular row and irespectivelyconnected with lines l1, 12, 13,14, 15, 'Z6, etc-, leading to said-other stations,.zthe rotary-arm -6--o'1 this-switch CH be ing connected with the'station local circuits;

The dialling disc D is rigid with a wheel 1 fitted with teeth or projections .2 acting in cam-like fashiontoreciprocate a sliding member 3"subj-ected-to. the action of :a :return spring :4. This reciprocating member 3-driv.es,- step by step, a ratchet wheel 5 which...carries-:themovable contact 46 of switch i-CH, this-ratchet wheel 5 being heldz'back bya retaining pawl I.

It will therefore-be seen that diallin'g disc '13, when rotated, causes, through the above 'described means,- switch arm' 6 to rotate in clockwisedirection. In order to callany station 1, 2, 3, etc., it sufiices to pass, opposite the end 10f reciprocating -member3,:a numberiof cam projections-"2 equal 'to the number of 'thi'sistation' 2 D, one orseveral times according as thisnumber'is lower or higher than 10, the plant'being capable of including up to thirty stations, even more). At the end of the operation, the :contact arm 6 of switch CH stops opposite the contact stud s1, s2, s3, etc. corresponding 'to thechosen station. However, "as it is necessary to be able to use dialling disc D to call aline of 'the'network without interference from ratchet wheel '5', I'provide on'the latter an abutment 8 (Fig; l) which, at the end-of the movement of said ratchet wheel, moves sliding piece 3 away from-'theratch'etwheel and makes it inoperative for the remainder of the operation of disc D.

On the other hand, his necessary'tto be able to return switch CHto zero positionat'the end of the conversation; for which purposeiratchet wheel "5 is subjectedrto the action of a return spring '9 and the switch hook CCz is connected to parts '3 and Ti in such manner that, when'the receiver'is hung back to its hook, ratchet "wheel 5 is released and comes back to .zero under the action 'of said spring '9. This action exerted for instance through pieces H), H (Figs. 1, '3 and 4) 1 It should be noted that, in Fig. 1, the hook is shown at CC1 (corresponding ,to its true position) and also at CCz and CC/3, it being understood that these last mentioned positions are given merely for the sake of clarity of the drawing, but correspond to the same part.

Release of ratchet "wheel '5 'may'furtheri'hap pen in other circumstances; inparticular'through the operation of buttons l2 and I3, which" will be hereinafter referred to, parts 3 and 1 being then acted upon by pieces such as l4, l5.

Concerning now the network switch, itis 'for instance constituted by an apparatus with a triple row of contacts, two rows of movable brushes 16,- ll with'contact studs 51, 111, and fixed brushes It, It constituting a'bip'olar'switch intended to close the chosen line R1, R2, while the third row of movable brushes 20,121, with fixed brushes 2th, 211' and a sector 22, is intended, through the operationof a relay 23, to switch on of the talking circuit and to bringthe-occupation circuit into action. (This relay 23 is, in Fig.1, shown in three different positions-for the sake of comprehension of the diagram.)

Concerning the third rows-of contacts, 'its'movable brush 21 is intended to cooperate with contact studs it, connected with the occupation circuits; as for movable brush 2ll,it is in fact constituted by two elements 23 and ZEJa-the first of byrotating disc I, and therefore the dialling disc 66 which is in contact with fixed brush 201, while the second one is in contact with sector 22, these two elements being adapted either to come into contact at 25 or on the contrary to be away from each other and this when brush 2| happens to pass on a contact stud 24, thus lifting the element 20 through the insulating piece 26.

The network switch, or the spindle thereof, is further provided with means for enabling it, in its zero position, to perform various functions taking place when the receiver is returned to its hook. Thus it comes to open a contact 21, by means of abutment element 28, for the purpose that will be indicated hereinafter. Likewise it mechanically keeps in holding position the armature 29 of relay 23, through part 30 (diagrammatically represented by arrows on Fig. 1) for reasons which are also to be set forth hereinafter.

The return of the network switch into zero position is obtained through a spring 3| acting upon the spindle of said switch. This switch is yieldingly held in every working position by a pawl 32 cooperating with a system of notches 33 carried by a piece 34. When the receiver is replaced upon its hook, and as indicated at CCs, Fig. l,'pawl 32 is moved away from piece 34, under the action of connecting member 35 and spring 3| can then act freely,

Finally, the system includes a private secret device which essentially includes, for instance, two contacts 36 suitably interposed in the circuits and which'are engaged, when the private station that is considered is called, under a piece 31, which is in turn controlled by the switch hook 0C1, through connection 38. When the receiver is replaced on its hook, these contacts are released (position shown by the drawing).

This plant, combined with a plurality of push buttons or other controlling means, such as shown at 39, I2, 43, I3 respectively for calling on a private line, switching to the private systems, switching the network to a private line and switching back to this network, works for instance in the following manner:

of the elements corresponding to the receiver resting on its hook:

The position of the various parts (as shown by the diagram of Fig. 1) is as follows:

, a. The network switch is in zero position, piece 32 being away from piece 34 whereby spring 3| has been able to act on said switch.

I). Relay 23, through which no current is flowing, is however mechanically kept in holding position by piece 30 (network switch in zero position).

0. Contact is open at 21.

d. The private secret circuit is out off at 36, due ot the fact that the contacts of the system have been able to disengage from operating piece 31 which is lifted as a consequence of the fact that the receiver hook is depressed.

Position Calling for a line of the private system The caller, having removed the receiver from its hook, operates diallin disc D according to the number of the private station to be called. Accordingly, wheel I is driven and causes, through sliding piece3, the brush 6 of switch OH to be actuated. At the end of this operation, the brush stops on the contact stud s1, s2, 83, etc. of the line ii," Z2, Z3, etc. corresponding to the desired private station (only six contact studs have been shown, by way of example).

On the return of disc D, wheel I rotates in the 4 opposed direction, but switch CH remains in position.

It then remains to call the desired station, which is done by depressing button 39, which, closing contacts 4!, sends a negative polarity through relay 42, toward the Wire L of the desired station, so as to come finally to the buzzer 43 of this station, and provided that the said station is free.

The contacts 36 of the calling station are, at the same time, brought toward the closing position by relay 42 and locked on piece 37, which is lowered due to the lifting of the receiver hook of this station.

At the called station the receiver is lifted and conversation may take place, in the conventional fashion.

If the receiver of the desired station is already removed from its hook, the call cannot take place since the negative polarity sent through relay 42 meets with another negative polarity at 44, at the desired station. On the other hand, contacts 36 remain open, at the calling station, which ensures secrecy.

Anyway, when the conversation is finished, the return of the receiver onto it hook causes switch CH to return to zero position through the action of the switch hook at CO2, m, l l.

Taking or switching to the network station that is being considered wishes to connect with one of the lines of the network.

He moves the index of networkswitch OR to the desired line.

Due to this operation, part 28 first closes the contact at 21, which has for its effect to supply relay 23 with current through: 21, sector 22, movable brushes 20, 25, 20, fixed brush 2011, relay 23, Said relay therefore remains in holding position, despite the release of the mechanical looking at 30.

Then, when brush 2| arrives on the contact stud corresponding to the chosen line RiRz, the circuit is cut off at 25, which releases relay 23, therefore opens the contacts 45, 46 and closes contacts 41, 4B. The conversation circuit MR (connected at abc to the dial) is thus closed on saidline RIRZ, through contacts l6, I1 which have been directed to this line in correspondence with contact stud 24 (on the drawing, a single line R1, R2 has been shown, for the sake of simplification) If it were desired to obtaina long distance line, the same operation would be performed, as shown on the drawing at OLL and at 111112.

On the other hand, occupation is indicated by contacts 49 and 29 which have been closed at the same time at 41 and 48 and which feed indicators V.

Passing a network line to a private station Having obtained a line of the network, it is desired to pass or switch it to another private station of the private system.

For this purpose, button I2 is depressed, which acts upon piece l4 and closescontact 5|, thus connecting the network with keeper coil 52.

At the same time, contact 53 restores relay 23 to holding position and feeds current to the occupation circuit through 53 and the negative terminal. 7

On the other hand, the operation of button l2 has applied pieces l4 and I5 against sliding member 3 and pawl I and broughtback to zerothe movable-brush a of switch'CH; at this time the conversation circuit is -again connected with, the the-network being held in:

private system and keeping, it ispossible to call. any station of the private: system in the manner above indicated.

Having obtained thecalled person, the operator tells him which line of thenetworkv he is to take, by allowing. the indicator to disappear through operation of the switching button 40, which keeps relay23 in holding position, through contacts 55 and 56, and clears the occupation circuit by opening contacts and. 55 (contacts 55-56 will be madebefore the breakingof 5'I55). The called person having suitably rotated his network switch, the indicator has reappeared. The initial station having then returned thereceiveronto its hook consequently returns its network switch tozero position.

Switching back to the network After having talked with a private station, the operator of the station" that is being described may switch back to the line of the network he had held in keeping. For this purpose, he releases button I2 through operation of button I3, which brings back the first mentioned into upper position, through piece 58 connected with piece I4, and cuts off the circuit 53, thus releasing relay 23. Line R1R2 is consequently again connected with the conversation circuit.

It will be seen that, anyway, all operations finally consist in exclusively operating disc D, network switch CR and the four buttons I2, I3, 39, 40, the whole being advantageously arranged, as shown by Fig. 2, with the network switch at the center of the disc and the indicators V grouped about this disc, same as the four above mentioned buttons.

Concerning the arrangement of the stations, from the constructional point of view, it is possible to proceed in various ways, in particular that shown by Figs. 3 and 4 and given merely by way of example.

According to this embodiment, the sleeve 59a of disc D, which extends through casing 60 and controls at 6 I, 62 the impulse device of the known type 63 carries the above mentioned disc I with the parts annexed thereto and switch CH and spindle 59 carries, at its lower part, the network switch with several rows of movable contacts I6, I1, 20, 2I, etc., of fixed contacts I8, I9, 251, 202, contact studs I61, I11 and sector 22.

At the base is provided the return spring BI and a piece 64 two projections 28 and 30 of which play the part above mentioned with respect to contact 21 and to the armature 29 of relay 23.

On the other hand the part I0 intended to control various pieces under the effect of the return of the receiver onto its hook, this hook acting at 65, is constituted by a sliding piece guided at 6B and carrying, on the one hand, a bent extension 38 which acts upon piece 31 with its spring 61, on the other hand, a finger 35 capable of cooperating with pawl 32 and, finally, another finger II, with an inclined surface II1, adapted to cooperate with an axis 68 carried by the end of a rod 69 provided with a projection 10, which can act upon sliding piece 3.

It will be seen that the displacement of part I0 in direction 1 under the effect of the return of the receiver onto its hook causes:

Piece 31 to be lifted,

Pawl 32 to be lifted at 35,

Rod 69 to be moved in direction f, sliding piece 3 to be lifted and in turn to lift pawl I.

On; the other hand,.the:-means Hand-r5810: engaging buttons I2 and. I3, are:constitutedzrby two arms carried as a'whole by an axis-II, with I a fork-shaped extension I5 'engagingon axis I58,v

this extension being itself subjected to the action I In a general .manner, while-I have, inthe abovedescription, disclosed what I deem to be practical and. efficient embodiments of my, invention,;.iti should be well understood that I do not WiShfltO be limited thereto as there might be changes made in the arrangement, disposition andiorm of the parts without departing from the principle of the present invention as comprehended within the scope of the accompanying claims.

What I claim is:

1. In a telephone system including a, plurality of lines and at least one calling station having a local circuit, a selecting device at this station including a fixed circular row of contact studs connected respectively with said lines, a dialling rotary disc operable manually in one direction through a plurality of consecutive angular positions about its axis, return spring means for urging said disc to rotate in the opposite direction, a rotary switch including a movable contact arm connected with the station local circuit and pivoted about the axis of said circular row of contact studs so as to run succssively over the respective contact studs of said row, a ratchet Wheel carrying said contact member, a return spring for urging said ratchet wheel backward, a holding pawl adapted to cooperate with said ratchet wheel, a reciprocating sliding member mounted to engage said ratchet Wheel to rotate it step by step, a return spring for said sliding member, and a wheel operatively connected with said dialling disc to be driven by it, said wheel being provided with cam projections arranged to cooperate with said reciprocating sliding member to drive it successively toward said ratchet wheel against its return spring for said first mentioned direction of rotation of said disc.

2. In a telephone system including a plurality of lines and at least one calling station having a local circuit, a selecting device at this station including a fixed circular row of contact studs connected respectively with said lines, a dialling rotary disc operable manually in one direction through a plurality of consecutive angular positions about its axis, return spring means for urging said disc to rotate in the opposite direction, a rotary switch including a movable contact arm connected with the station local circult and pivoted about the axis of said circular row of contact studs so as to run successively over the respective contact studs of said row, a ratchet wheel carrying said contact member, a return spring for urging said ratchet wheel backward, a holding pawl adapted to cooperate with said ratchet wheel, a reciprocating sliding member mounted to engage said ratchet wheel to rotate it step by step, a return spring for said sliding member, a wheel operatively connected with said dialling disc to be driven by it, said wheel being provided with cam projections arranged to cooperate with said reciprocating sliding member to drive it successively toward said ratchet wheel against its return spring for said first mentioned direction of rotation of said disc, and means carried by said ratchet wheel for making said reciprocating sliding member inoperative once said ratchet wheel has turned through the angle corresponding to said finder contact being located on the last of said contact studs.

3. In a telephone system including a plurality of lines and at least one calling station having a local circuit, a selecting device at this station including a fixed circular row of contact studs connected with said lines and a rotary arm adapted to run on said contact studs to connect them with said local circuit, a dialling rotary disc operable through a plurality of consecutive angular dialling positions about its axis, means operative by said disc for rotating said arm forward from one of said contact studs to the next one in res onse to rotation of said disc in direction from one of said dialling positions to the next one, and means for opposing backward rotation of said arm during further rotation of said disc in the other direction, whereby accumulative progression of said arm along said row of contact studs can be obtained in response to successive reciprocating operations of said dialling disc.

PIERRE DESCHAMPS.

REFERENCES CITED The following references are of record in the file of this patent: 

